关于primetime的问题

龙溪小泮 · 发表于 2012-10-31 10:49:27

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本帖最后由龙溪小泮于 2012-10-31 14:19 编辑

set link_path “* xxxx” . 这儿的“*”有什么作用，而且是必须要的...
set_operating_conditions -analysis_type bc_wc. 这儿不管设哪种analysis_type，pt跑出来始终用的vco模式，这又是什么原因啊！！！！！

“set_operating_conditions -analysis_type bc_wc -min u055lscspmvbbr_110c-40_bc -max u055lscspmvbbr_090c125_wc”
跑出来是：Loading verilog file '/home/yangqg/projects/encounter/out/netlist/cfg_top_v12H.v'
Loading db file '/home/yangqg/projects/encounter/in/lib/u055lscspmvbbr_110c-40_bc.db'
Loading db file '/home/yangqg/projects/encounter/in/lib/u055lscspmvbbr_090c125_wc.db'
Linking design cfg_top...
Information: Removing 17 unneeded designs..... (LNK-034)
Information: 878 (72.26%) library cells are unused in library u055lscspmvbbr_110c-40_bc.....
Information: 1215 (100.00%) library cells are unused in library u055lscspmvbbr_090c125_wc.....
Information: total 2093 library cells are unused.
Information: Issuing set_operating_conditions for setting analysis mode on_chip_variation. (PTE-037)
set_operating_conditions -analysis_type on_chip_variation -library [get_libs {u055lscspmvbbr_110c-40_bc.db:u055lscspmvbbr_110c-40_bc}]
Design 'cfg_top' was successfully linked.
Warning: The BC_WC analysis mode will be phased out in future releases. (PT-009)
Warning: Creating a clock on internal pin 'U41809/Z'. (UITE-130)
Warning: Creating a clock on internal pin 'U41812/Z'. (UITE-130)
Information: Derived library resistance unit is 1.000000 Kohm (Time unit is 1 ns, and Capacitance unit is 1.000000 pF). (DES-028)

“set_operating_conditions -analysis_type single -min u055lscspmvbbr_110c-40_bc -max u055lscspmvbbr_090c125_wc”
跑出来的是：
Loading verilog file '/home/yangqg/projects/encounter/out/netlist/cfg_top_v12H.v'
Loading db file '/home/yangqg/projects/encounter/in/lib/u055lscspmvbbr_110c-40_bc.db'
Loading db file '/home/yangqg/projects/encounter/in/lib/u055lscspmvbbr_090c125_wc.db'
Linking design cfg_top...
Information: Removing 17 unneeded designs..... (LNK-034)
Information: 878 (72.26%) library cells are unused in library u055lscspmvbbr_110c-40_bc.....
Information: 1215 (100.00%) library cells are unused in library u055lscspmvbbr_090c125_wc.....
Information: total 2093 library cells are unused.
Information: Issuing set_operating_conditions for setting analysis mode on_chip_variation. (PTE-037)
set_operating_conditions -analysis_type on_chip_variation -library [get_libs {u055lscspmvbbr_110c-40_bc.db:u055lscspmvbbr_110c-40_bc}]

chrisyl · 发表于 2012-10-31 13:52:46

*是指读到内存中的设计吧，当然是必须的。
ocv 这个不太清楚，贴报告上来看吧

龙溪小泮 · 发表于 2012-10-31 14:20:54

回复 2# chrisyl

贴出来了，多谢你的解答

xiaoshunzi19 · 发表于 2012-10-31 21:26:53

哈哈我也不知道哈同求

chrisyl · 发表于 2012-11-1 10:19:39

回复 3# 龙溪小泮

你报一条路径的时序，看实际用的是bc_wc还是ocv呢？

Rofia · 发表于 2012-11-5 21:24:35

设了derating就会自动切换到OCV

idanceu · 发表于 2015-7-8 20:16:05

感谢分享

Haniel1986 · 发表于 2016-1-26 18:55:17

感谢回答

lvgf0301 · 发表于 2016-3-30 20:00:20

搞清bc_wc和ocv的区别。

pavan905 · 发表于 2016-8-15 21:45:06

Hi, How to learn prime time tool?

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